Falling prices are of particular concern to Russia. Russia needs high oil prices to buoy its economy. The country has seen its economic performance slow under the weight of sanctions over Ukraine and weakening domestic demand. The Russian Central Bank forecasts growth over 2014 to be a meager 0.4%, improving marginally to between 0.9%-1.1% in 2015.

The problem is that Russia's latest budget requires oil prices to average at least $100 a barrel in order to cover the government's spending promises.